Strain Analysis for Grain Refinement and Mechanical Behaviour of AA5083 Processed Through Equal Channel Angular Pressing Technique

Abstract

A metal forming technique called equal channel angular pressing is used to produce alloys and metals with ultrafine grain and nanocrystalline structure. Using this method, grain refining to the nano or submicron-scale is possible in materials with high strain super plasticity without affecting the size of the workpiece. One of the greatest techniques for creating bulk materials with ultra-fine grains is equal channel angular pressing. During this procedure, metal is continuously pushed through a channel die that has been particularly made with intersecting channels at different angles. The material is pass through a die in this procedure that has two channels that meet at a particular angle. Finer grains are formed as a result of the material’s deformation when it passes through the die. The creation of ultra-fine grains is influenced by a number of die design characteristics. The effects of processing route, corner angle, channel angle, and number of passes in die design on grain refinement. After comparing the results of several parameters, it was found that (90°) is the ideal channel angle for producing the maximum shear strain, and this strain reduces as the channel angle increases. The die was designed and produced in the lab with ideal design specifications, including a corner angle of (20°) and a channel angle of (90°). The mechanical characteristics of AA5083 were examined both before and after the Equal Channel Angular Pressing method. This study examines and analyses the mechanical behaviour of AA5083 that is treated through the use of an ECAP die that has ideal design specifications. Pressing was done between 0 and 2 times when using the ሺB_Cሻ path. According to the results, the grain size decreased from 480 nm to 170 nm, and the tensile strength increased from 225.8 MPa to 358.4 MPa after two ECAP runs.

Keywords

Microstructure / Grain refinement / Equal channel angular pressing / Strain analysis

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